Unreviewed, rolling back in part1 of r118646.
This patch includes everything necessary for lazy finalization, but keeps eager finalization enabled for the time being. Weak pointer finalization should be lazy https://bugs.webkit.org/show_bug.cgi?id=87599 Reviewed by Sam Weinig. * heap/MarkedBlock.cpp: * heap/MarkedBlock.h: (JSC::MarkedBlock::resetAllocator): * heap/MarkedSpace.cpp: (JSC::MarkedSpace::resetAllocators): * heap/MarkedSpace.h: (JSC::MarkedSpace::resetAllocators): Don't force allocator reset anymore. It will happen automatically when a weak set is swept. It's simpler to have only one canonical way for this to happen, and it wasn't buying us anything to do it eagerly. * heap/WeakBlock.cpp: (JSC::WeakBlock::sweep): Don't short-circuit a sweep unless we know the sweep would be a no-op. If even one finalizer is pending, we need to run it, since we won't get another chance. * heap/WeakSet.cpp: (JSC::WeakSet::sweep): This loop can be simpler now that WeakBlock::sweep() does what we mean. Reset our allocator after a sweep because this is the optimal time to start trying to recycle old weak pointers. (JSC::WeakSet::tryFindAllocator): Don't sweep when searching for an allocator because we've swept already, and forcing a new sweep would be wasteful. * heap/WeakSet.h: (JSC::WeakSet::shrink): Be sure to reset our allocator after a shrink because the shrink may have removed the block the allocator was going to allocate out of. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@119878 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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